Exchange dephasing and motional narrowing of vibrational modes

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Abstract
A general formalism using cumulant expansion techniques is applied to the study of the band shapes of interacting or overlapping vibrational bands in dense media. The formalism is applied to the interaction between a fundamental and a hot band and that between two fundamentals. Both models appear to be capable of describing the recent experimental results of Harris and co‐workers on the band shapes of modes in the C–H stretching region of solid durene.